Abstract: In a preferred embodiment of the present invention, a printing press comprises a printing plate cylinder, a blanket cylinder and a support arrangement for mounting the printing plate cylinder in an opposed, movable relation to the blanket cylinder. A biasing arrangement is arranged and configured to bias the printing plate cylinder and the blanket cylinder toward one another to form a nip. According to a feature of the present invention, a stop member is arranged and configured to maintain a minimum spacing between the printing plate cylinder and the blanket cylinder.

Abstract: A printing unit arrangement in a web-fed rotary printing press includes at least one printing unit 2a having a first and second plate cylinder 4,6 and associated first and second blanket cylinders 8, 10 which are mechanically coupled via meshing gear wheels and which are commonly driven by one drive motor 12. A second printing unit of the printing unit arrangement includes a first and second plate cylinder 24, 26 and associated first and second blanket cylinders 28, 30. The first plate cylinder 24 and the first and second blanket cylinders 28, 30 are mechanically coupled via meshing gea wheels and are commonly driven by a first drive motor 42. The second plate cylinder 26 is individually driven by a second drive motor 46, and is engageable and disengageable from the associated second blanket cylinder 30 while the printing press is in operation, in order to perform flying edition changes or changes of a spot color.

Abstract: A printing unit arrangement in a web-fed rotary printing press includes at least one printing unit 2a having a first and second plate cylinder 4, 6 and associated first and second blanket cylinders 8, 10 which are mechanically coupled via meshing gear wheels and which are commonly driven by one drive motor 12. A second printing unit of the printing unit arrangement includes a first and second plate cylinder 24, 26 and associated first and second blanket cylinders 28, 30. The first plate cylinder 24 and the first and second blanket cylinders 28, 30 are mechanically coupled via meshing gear wheels and are commonly driven by a first drive motor 42. The second plate cylinder 26 is individually driven by a second drive motor 46, and is engageable and disengageable from the associated second blanket cylinder 30 while the printing press is in operation, in order to perform flying edition changes or changes of a spot color.